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Balmy breezes will continue overnight across the Tampa Bay area as a tight pressure gradient has set up between Hurricane Isaac to our west and high pressure over the Atlantic.

On Wednesday we begin to transition to a more typical summer pattern as high pressure builds westward from the Atlantic. The ridge axis will stay to our north, which will maintain an easterly flow over the region. With this set-up, we expect late afternoon thunderstorms, with only limited activity during the first part of the day. The best chances of rain will be across the nature coast, with slightly lower amounts to the south.

Overnight A few thunderstorms possible, mostly cloudy, with a low around 79. South southeast wind 9 to 11 mph. Chance of precipitation is 20%.

Wednesday Scattered showers and thunderstorms, mainly after 1pm. Partly sunny, with a high near 91. Heat index values as high as 104. South wind 9 to 15 mph, with gusts as high as 21 mph. Chance of precipitation is 50%. New rainfall amounts between a quarter and half of an inch possible.

Thursday Scattered showers and thunderstorms after 1pm. Mostly sunny, with a high near 92. South wind 5 to 8 mph. Chance of precipitation is 30%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Friday Scattered showers and thunderstorms. Mostly sunny, with a high near 93. East southeast wind 5 to 8 mph. Chance of precipitation is 30%.

Saturday Scattered showers and thunderstorms. Mostly sunny, with a high near 93. Southeast wind 3 to 8 mph. Chance of precipitation is 30%.

Sunday Scattered showers and thunderstorms. Mostly sunny, with a high near 91. Chance of precipitation is 30%.

Labor Day Scattered showers and thunderstorms. Mostly sunny, with a high near 91. Chance of precipitation is 30%.

Tropics Update

Isaac is moving slowly northwestward along the coast of southeast Louisiana. A dangerous storm surge continues along the northern Gulf coast.